Can anyone id these headers

I played with the image, loaded it onto comcast host, and it just comes up thumbnail, we were having a very difficult time trying to get these on a 72 scamp 318 car, undid mounts lifted motor as high as possible etc, did not try from the bottom up, so here is the p[lan undo center link, and try and push up from bottom sound about right? Any other tips? I know its a shoehorn fit, but this was rediculasly tight